Author
|
Shirai Y; Katakura H
|
著者
|
白井洋一
|
Title
|
Host plants of the phytophagous ladybird beetle, Epilachna
vigintioctopunctata (Coleoptera : Coccinellidae), in Southeast Asia and
Japan
|
タイトル
|
東南アジアと日本におけるニジュウヤホシテントウの寄主植物
|
Keywords
|
Cucurbitaceae, Epilachninae, host plant, Solanaceae, Southeast
Asia
|
Abstract
|
The host plants of Epilachna vigintioctopunctata in the Southeast Asia
region are still not fully known. Larval survival and development of E.
vigintioctopunctata on solanaceous, cucurbitaceous and leguminous plants
were examined for seven local populations from Japan, Thailand, Malaysia
and Indonesia. All populations showed the highest emergence rate and
largest adult body size when reared on plants of the genus Solanum
(Solanaceae). On Cuccinia indica (Cucurbitaceae), the Malaysian population
had an emergence rate of 32% and the Thailand and two Indonesian
populations each had an emergence rate of ca. 10%. However, newly emerged
adults of these four populations were not able to produce the next
generation when reared on C. indica because of very low fecundity and
hatchability. On Centrosema pubescens (Leguminosae), the Malaysian and two
Indonesian populations each had an emergence rate of ca. 30%. Newly
emerged adults of these three populations showed 62 to 72% hatchability
when reared on Ce. pubescens. It is concluded that the major host plants
of E. vigintioctopunctata in Southeast Asia are solanaceous plants and
this species is unable to complete its life cycle solely on cucurbitaceous
plants.
|
要旨
|
ニジュウヤホシテントウの寄主植物を再検討するため，日本・タイ・マレーシア・インドネシアの7地域個体群を用いて，ナス科・ウリ料・マメ科植物に対する幼虫期の生存価を調べた。すべての個体群はナス科（Solanum属）で最も高い羽化率を示した。ウリ科（ヤサイカラスウリ）では，マレーシア個体群が32％，タイとインドネシア個体群が約10％の羽化率を示した。ウリ科で羽化した成虫はウリ科のみを食草とした時，低い産卵数と孵化率のため，次世代を産出できなかった。マメ科（ムラサキチョウマメモドキ）では，マレーシアとインドネシア個体群が約30％の羽化率を示し，マメ科のみでも低い増殖率ながら次世代を産出できた。東面アジアのニジュウヤホシテントウの主要寄主植物はナス科のみで り，ウリ科作物の害虫として報告されているニジュウヤホシテントウは外部形態のよ似たEpilachna
pusillanimaと混同されている可能性が高い。
|
Journal
|
Appl.Ent.Zool., 34(1), 1999, p.75-83.
|